diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/firewire/ohci.c | 116 |
1 files changed, 49 insertions, 67 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index 5cb7c7603c2c..368420e4b414 100644 --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -2139,53 +2139,42 @@ static void bus_reset_work(struct work_struct *work) at_context_flush(&ohci->at_request_ctx); at_context_flush(&ohci->at_response_ctx); - spin_lock_irq(&ohci->lock); - - ohci->generation = generation; - reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); - reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset); - - if (ohci->quirks & QUIRK_RESET_PACKET) - ohci->request_generation = generation; - - /* - * This next bit is unrelated to the AT context stuff but we - * have to do it under the spinlock also. If a new config rom - * was set up before this reset, the old one is now no longer - * in use and we can free it. Update the config rom pointers - * to point to the current config rom and clear the - * next_config_rom pointer so a new update can take place. - */ - - if (ohci->next_config_rom != NULL) { - if (ohci->next_config_rom != ohci->config_rom) { - free_rom = ohci->config_rom; - free_rom_bus = ohci->config_rom_bus; + scoped_guard(spinlock_irq, &ohci->lock) { + ohci->generation = generation; + reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset); + reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset); + + if (ohci->quirks & QUIRK_RESET_PACKET) + ohci->request_generation = generation; + + // This next bit is unrelated to the AT context stuff but we have to do it under the + // spinlock also. If a new config rom was set up before this reset, the old one is + // now no longer in use and we can free it. Update the config rom pointers to point + // to the current config rom and clear the next_config_rom pointer so a new update + // can take place. + if (ohci->next_config_rom != NULL) { + if (ohci->next_config_rom != ohci->config_rom) { + free_rom = ohci->config_rom; + free_rom_bus = ohci->config_rom_bus; + } + ohci->config_rom = ohci->next_config_rom; + ohci->config_rom_bus = ohci->next_config_rom_bus; + ohci->next_config_rom = NULL; + + // Restore config_rom image and manually update config_rom registers. + // Writing the header quadlet will indicate that the config rom is ready, + // so we do that last. + reg_write(ohci, OHCI1394_BusOptions, be32_to_cpu(ohci->config_rom[2])); + ohci->config_rom[0] = ohci->next_header; + reg_write(ohci, OHCI1394_ConfigROMhdr, be32_to_cpu(ohci->next_header)); } - ohci->config_rom = ohci->next_config_rom; - ohci->config_rom_bus = ohci->next_config_rom_bus; - ohci->next_config_rom = NULL; - /* - * Restore config_rom image and manually update - * config_rom registers. Writing the header quadlet - * will indicate that the config rom is ready, so we - * do that last. - */ - reg_write(ohci, OHCI1394_BusOptions, - be32_to_cpu(ohci->config_rom[2])); - ohci->config_rom[0] = ohci->next_header; - reg_write(ohci, OHCI1394_ConfigROMhdr, - be32_to_cpu(ohci->next_header)); - } - - if (param_remote_dma) { - reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0); - reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0); + if (param_remote_dma) { + reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0); + reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0); + } } - spin_unlock_irq(&ohci->lock); - if (free_rom) dmam_free_coherent(ohci->card.device, CONFIG_ROM_SIZE, free_rom, free_rom_bus); @@ -2626,33 +2615,26 @@ static int ohci_set_config_rom(struct fw_card *card, if (next_config_rom == NULL) return -ENOMEM; - spin_lock_irq(&ohci->lock); - - /* - * If there is not an already pending config_rom update, - * push our new allocation into the ohci->next_config_rom - * and then mark the local variable as null so that we - * won't deallocate the new buffer. - * - * OTOH, if there is a pending config_rom update, just - * use that buffer with the new config_rom data, and - * let this routine free the unused DMA allocation. - */ - - if (ohci->next_config_rom == NULL) { - ohci->next_config_rom = next_config_rom; - ohci->next_config_rom_bus = next_config_rom_bus; - next_config_rom = NULL; - } + scoped_guard(spinlock_irq, &ohci->lock) { + // If there is not an already pending config_rom update, push our new allocation + // into the ohci->next_config_rom and then mark the local variable as null so that + // we won't deallocate the new buffer. + // + // OTOH, if there is a pending config_rom update, just use that buffer with the new + // config_rom data, and let this routine free the unused DMA allocation. + if (ohci->next_config_rom == NULL) { + ohci->next_config_rom = next_config_rom; + ohci->next_config_rom_bus = next_config_rom_bus; + next_config_rom = NULL; + } - copy_config_rom(ohci->next_config_rom, config_rom, length); + copy_config_rom(ohci->next_config_rom, config_rom, length); - ohci->next_header = config_rom[0]; - ohci->next_config_rom[0] = 0; + ohci->next_header = config_rom[0]; + ohci->next_config_rom[0] = 0; - reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); - - spin_unlock_irq(&ohci->lock); + reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus); + } /* If we didn't use the DMA allocation, delete it. */ if (next_config_rom != NULL) { |